Control device for atomizer nozzles, burner heads, and the like



Oct. 4, 1938. P. DEL GENOVESE 2,131,936

CONTROL DEVICE FOR ATOMIZER NOZZLES, BURNER HEADS, AND THE LIKE Filed June 30, 1956 2 Sheets-Sheet l Oct. 4, 1938 P. DEL sENoVEsE 2,131,933

CONTROL DEVICE FOR A'ron uzga NOZZLE-S. Bul'mnri HEADS. AND THE LIKE Ffied Ju e so, 1936 2 Sheet s-Sh eet 2 f".6' mgr Patented Oct. 4, 1 938 2,131,936 coN'moL nnvrcn FOR momma NOZZLES,

BURNER HEADS, AND THE LIKE Pietro Del Genovcse, Pisa, Italy I Application June 30, 1936, Serial'No. 88,226 In Italy fl, 1936 Claims. (01. 299-118) My present invention has for its object to provide a control device for atomizer nozzles, burner heads, and the like, which controls the flow of the liquidto the ejector head through a double 5 system of intercepting members so as to positively prevent losses of liquid from the nozzle, and also permit oi. instantaneously starting and stopping the action of the nozzle.

A nozzle provided with the controller accordo ing to my present invention permits of semiautomatically controlling the iiow of the liquid to the ejector or atomizer head, and variating the section and number of passages leading to said head, and securing a broad range of discharge of atomizer.

My invention further comprises a device for automatically cleaning a. filter and expelling, by operation, the impurities from the liquid to be atomized, by operating the'dis'charge controller. The said expulsion of the impurities is eifected by the operation, and independently from the operation of the atomizer. Thereby the necessity of dismounting the filter for cleaning purposes is avoided.

My invention is illustrated by way of example in the annexed drawings in which:

Fig. 1 is an axial longitudinal section of an atomizer nozzle comprising the control device according to invention, v Fig. 2 is a section on line II-II of Fig. 1, Figs. 3, 4 and 5 are sections on line HI--III of Fig. 1 and show the double cam and valve in three different positions, respectively,

Figs. 6, 7 and 8 are diagrams of the reciprocal 35 positions of passages of ejector head and passages of rotary valve to be described hereafter with reference toFigs. 3, 4 and 5, and

Fig. 9 is a'sectional view of a modification of part of the device shown in Fig. 1.

The nozzle, Fig. 1, comprises a hollow body I on the front end of which the ejector head 2 is screwed which in the example shown comprises a sphero-cylindrical member 3. Bearing on the back face of the ejector head 2' and the j 45 sphero-cylindrical'member 3, a cylindrical body 4 with passages 5 continued in grooves 6 is pro: vided on the outer side face of member 3 and converging in the front ejector chamber 1 whence the liquid is discharged through passage 8.

Bearing, on the back face of the cylindrical body'5 there is a rotary valve 9 comprising a. rotary body with passages ill (see also Fig. 2) connecting chamber II to passages 5 of cylindricalmember 4 as will be described hereafter.

Rotary valve 9 is operated by flywheel I! through shaft ii on. which cam M is' keyed. 'The latter operates valve 15 through spindle Ii. 'lhe pressure of liquid acting on the back face of rotary valve 9 is counter-balanced pressure acting on the front face of rotary body l1, and a sufliciently tight closure betweentheshaft I3 and the back part I! of body I is efiected by the packing It.

The control device operates as follows:

In the position of rest the nozzle and the parts are in the positions shown in Figs. 3 and 6. The cone valve 15 bears on its seat 15', and the truncated cone valve 20 bears on its seat 1|. It is, however, to, be noted that the latter may be omitted in certain modifications of my present invention, as is seen for instance in Fig. 9.41am ll bears with its part of minimum radius 22 against tip 23 of spindle IS. The liquid under Pressure -from the feeding duct-through nipple 24 is opthe truncated cone valve 20 and its seat 21 a.

narrow path is opened through which the flow of liquid to chamber ll of burner i is partially choked. At the same time the rotary valve 9 is in the position shownjn Fig. 7 with respect to passages 5 of member 4. Cam ll, whiclris here shown double for illustrative pin-poem is provided with notches l4 eo-operating in kno manner with tip 23 of stem l6.

Fig. 5' shows valve 28 raised completely from its seat, cam I being turned by aboui; 90" fromthe position shown in Fig. 3. In Fig. 8 ID of rotary valve 9 are shown in front of passages 5 of member 4 As is seen from Figs. .6. 7 and 8, III are preferably,though riot n,of elliptic section with the greater axis placed perpendicularly to the radius passing through the centre of the canal. Owing to this conformation of passages Ill, canals 5-being of circular section, the choking of flow of liquid from passages III to passages 5 during operation of fiywheel 12 is gradual and a little in advance and retard, respectively, of movements of valves 20 and I5.

Back part I9 of body I of burner of being integral as shown in Fig. 1. may also be separable, such as shown at I! in Fig. 9.

26 is a pointer co-operating with a disc 21,

' and indicates to operator the relative position of cam II to valves 9, l5 and 20.

- In chamber II is placed a truncated cone filter 28 rotatable with shaft i3 co-operating with fixed preferably elastic scrapers 29 designed for detaching residues'left on filter "and collecting same in the-funnel formed from whence they are discharged. from time to time through a cock 3 I. On the other hand, of course, the filter .28 may be fixed and, vice versa, the scrapers 29 controlled by the rod of flywheel l2 may be rotatable. In order to fix the position of flywheel I! any suitable known device may be used, such as for instance, a pawl co-operating with a ratchet wheel, or the like.

It is understood that my invention has been described and illustrated by a preferred form of realization but structural modifications may be made within the scope of the invention.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

l. A control device for a fuel burner nozzle comprising a rotary valve having a plurality of discharge openings, said valve. being rotatable to selectively open different numbers of said openings for controlling the flow of fuel to the nozzle, a rotatable shaft for operating said valve, a second valve having a stem controlling the flow of fuel to said rotary valve and cam means upon said rotatable shaft acting on said stem for operating said second valve in sy'nchronism with said first mentioned valve to open said second valve more or less respectively as a greater or less number of openings in said rotary valve are opened to thereby correlate the fuel supplied by said second valve to the fuel discharged by said rotary valve.

2. A control device for a fuel burner nozzle comprising a rotary valve having a plurality of discharge openings, said valve being rotatable to selectively open different numbers of said openings for controlling the flow of fuel to the nozzle, a rotatable shaft for operating said valve, a second valve controlling the flow of fuel to said rotary valveconstantly urged to closed position by the pressure of the fuel, a stem upon said second valve and cam means upon said rotatable shaft for acting on said stem to open said second valve against said fuel pressure whereby said second valve is operated in synchronism with said first mentioned valve to open said second valve more or less respectively as a greateror less number of openings in said rotary valve are opened to thereby correlate the fuel supplied by said second valve to the fuel discharged by said rotary valve.

3. A control' device for a fuel burner nomle comprising a rotary valve having a plurality of discharge openings, said valve being rotatable to selectively open different numbers of said openings for controlling the flow of fuel to the nozzle, a-rotatable shaft for operating said valve, a second reciprocating valve controlling the flow of fuel to said rotary valve and a cam fixed to said rotatable shaft acting directly upon said reciprocating valve for operating said reciprocating valve in synchronism with said rotary valve to open said second valve more or less respectively as a greater or less number of openings in said rotary valve are opened to thereby correlate the fuel supplied by said second valve to the fuel discharged by said rotary valve.

4. A control device for a fuel burner nozzle comprising a rotary valve having a plurality of discharge openings, said valve being rotatable to selectively open different numbers of said openings for controlling the flow of fuel to the nozzle, a rotatable shaft for operating said valve, a second reciprocating valve having a stem controlling the flow of fuel to said rotary valve, a delayed action valve cooperating with said reciprocating valve also controlling the flow of fuel to said rotary valve and cam means upon said rotatable shaft acting upon said stern for operating said reciprocating valve and said delayed action valve in synchronism with said rotary valve to open said second valve more or less respectively as a greater or less number of .openings in said rotary valve are opened to thereby correlate the fuel supplied by said second valve to the fuel discharged by said rotary valve.

5. A control device for a fuel burner nozzle comprising a rotaryvalve having a plurality of discharge openings, said valve being rotatable to selectively open diiferent numbers of said openings for controlling the flow of fuel to the nozzle, a rotatable shaft for operating said valve, a second valve having a stem controlling the flow of fuel to saidrotary valve, cam means upon said rotatable shaft acting on said stem for operating said second valve in synchronism with said rotary valve to open said second valve more or less respectively as a greater or less number of openings in said rotary valve are opened to thereby correlate the fuel supplied by said second valve .to the fuel discharged by said rotary valve and notches upon said cam means cooperating with said stem for determining predetermined openings of said second valve.

PIIE'I'RD DEL GENOVESE. 

